Interesting question. Answer is Graham Gooch of England who made a triple century and then another century in at test match at Lord's against back in July 1990. Kumar Sangakkara of Sri Lanka is only other batsman to score a triple and a century in same test match while Mark Taylor of Australia and Brian Lara are only other two to make more than 400 runs in a single test match including both innings although Lara made all those runs in a single innings. here's a list..